JP5645064B2 - Locking structure of door for heat treatment apparatus and heat treatment apparatus equipped with door - Google Patents

Description

  The present invention relates to a lock structure of a door for a heat treatment apparatus for covering a heat treatment line from the outside, and a heat treatment apparatus provided with the door having the lock structure.

  2. Description of the Related Art Conventionally, there has been known a heat treatment apparatus that includes a heat treatment line that automatically operates and in which the work processing unit is covered with various covers from outside.

  For example, a high-frequency heat treatment apparatus such as the following Patent Document 1 includes a heat treatment line for continuously and automatically carrying in, carrying out, and carrying out workpieces, and a part of the heat treatment unit or the entire apparatus is covered with various covers. Covered.

  In such a high-frequency heat treatment apparatus, when changing the workpiece to be heat-treated, various parts such as various jigs, heat treatment coils, cooling members, etc. are exchanged and adjusted in order to realize a desired heat treatment. Maintenance work needs to be done. In order to facilitate such maintenance work, the cover is configured to be openable and closable.

JP 2007-239059 A

  However, if the cover can be opened and closed, the heat treatment line may be operated with some of the covers open, or some of the covers may be opened during operation. It cannot be fully realized. In order to prevent such an inconvenience, for example, it may be possible to detect that each cover is in an open state and call attention, or to fix each cover so that it cannot be opened except when necessary. . However, in an apparatus in which a large number of single covers are arranged, the number of members for detecting the open state of each cover, a member for fixing each cover, and various parts accompanying them increases, and the cover structure Is likely to be complicated.

  Accordingly, the present invention has an object to provide a lock structure for a door for a heat treatment apparatus having a simple configuration, which can suppress the number of members for fixing the door in a closed state or detecting an open state. It is another object of the present invention to provide a heat treatment apparatus including a door having such a structure.

The lock structure of the door for a heat treatment apparatus of the present invention that achieves the above object comprises a sliding door that is slidably supported by a rail, and is provided with a first door and a second door that can be opened and closed at a position corresponding to the heat treatment line. And a lock portion that is provided in an overlapping portion that overlaps with each other when the first and second doors are closed, and that connects the first and second doors to each other so that they cannot be moved relative to each other. And a detection unit capable of detecting the unlocked state of the unit, and configured to prevent the heat treatment line from being driven when the unlocked state of the lock unit is detected by the detecting unit.

The heat treatment apparatus having the opening / closing door of the present invention that achieves the above object includes a heat treatment line that is controlled automatically by a control unit and that automatically operates, and a sliding door that is slidably supported on a rail and covers the outside of the heat treatment line. In the heat treatment apparatus having the second opening / closing door, the first and second opening / closing doors are provided in overlapping portions with each other closed, and the first and second opening / closing doors are connected to each other so that relative movement is impossible. And a detecting unit capable of detecting the unlocking state of the locking unit. When the detecting unit detects the unlocking state of the locking unit, the control unit prevents automatic operation of the heat treatment line. It is configured as follows.

  According to such a heat treatment device door lock structure or a heat treatment device equipped with a door, the first and second doors are connected to each other and fixed so as not to move relative to each other. And a detection unit capable of detecting the unlocked state, so that when the first and second doors are in the unlocked state, the operation of the heat treatment line can be prevented based on a signal from the detection unit. The heat treatment line can be prevented from operating when the first and second doors are open. In addition, since the lock part is provided in the overlapping part that overlaps with each other when the first and second doors are closed, and the detection part that can detect the unlocked state of the lock part is provided, the lock part and the detection part Can be kept low.

In the heat treatment apparatus having a locking structure or closing door of the opening and closing door for these thermal processing apparatus, and the lock portion and the other possible coupling lock actuating portion is supported by the one of the first and second opening and closing door, overlapping It is preferable to provide a lock receiving portion fixed to a predetermined position of the rail corresponding to the portion and connectable to the lock operating portion.

  In this way, even if the first and second doors are made of sliding doors slidably supported by the rail, the lock receiving portion is fixedly installed at a predetermined position of the rail, so that the lock operation is performed. If the first and second doors are connected by the portion and the lock operating portion is connected to the lock receiving portion, the first and second doors can be arranged at predetermined positions on the rail. Therefore, it is possible to reliably cover the heat treatment line with the first and second doors closed.

  The first or second door has a lower edge portion and an overhang portion provided above the lower edge portion and bulging outward from the lower edge portion, and the lock portion and the detection portion are overhangs. It is preferable to be provided within the bulging range of the part.

  In this way, since the lock part and the detection part are provided within the bulging range of the overhang part, the lock part and the detection part are less likely to protrude outward in the horizontal direction from the first and second doors. Protruding parts to the outside of the sensor part and the detection part are unlikely to get in the way.

  According to the lock structure of the door for the heat treatment apparatus or the heat treatment apparatus provided with the door according to the present invention, the lock portion that connects the first and second doors to each other and fixes them relative to each other, and the lock of the lock portion A detection unit capable of detecting the release state, the lock unit is provided in an overlapping portion with the first and second doors, and a detection unit for detecting the lock release state of the lock unit is provided. The door for covering the line from the outside is fixed in a closed state, and the number of members for detecting the open state can be suppressed to a small level. It is possible to provide a heat treatment apparatus.

It is a schematic front view of the state which removed the cover of the heat processing apparatus which concerns on embodiment of this invention. It is a schematic top view of the state which removed the cover of the heat processing apparatus which concerns on embodiment. (A) is a front view of the upper cover which concerns on the heat processing apparatus of embodiment, (b) is the top view. It is a side view of the upper cover which concerns on the heat processing apparatus of embodiment. (A) is a side view of the outside upper opening-and-closing door which concerns on the heat processing apparatus of embodiment, (b) is a rear view of the upper slide support part. It is a side view of the inner upper door which concerns on the heat processing apparatus of embodiment. It is a rear view of the upper slide support part in the inner upper door which concerns on the heat processing apparatus of embodiment. (A) is a side view showing the unlocked state of the lock structure according to the heat treatment apparatus of the embodiment, (b) is a partial cross-sectional view along the line AA in FIG. 7 (a), (c) is B in FIG. 7 (a) -B partial sectional view, (d) is a C arrow view of (a), (e) is a side view showing the locked state of the lock structure. It is a partial right view for demonstrating the liquid supply path which concerns on the heat processing apparatus of embodiment. It is a partial front view for demonstrating the liquid supply path which concerns on the heat processing apparatus of embodiment.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 7.
The workpiece W in the heat treatment apparatus having the door lock structure according to this embodiment is a constant velocity joint intermediate for producing a constant velocity joint for a vehicle, for example, and the cup portion Wc and the stem shaft portion Ws are provided. It is provided adjacent to the same axis. In the present embodiment, the cup portion Wc may be referred to as a workpiece lower portion, and the stem shaft portion Ws may be referred to as a workpiece upper portion.

[overall structure]
In the heat treatment apparatus 1, as shown in FIGS. 1 to 3, a heat treatment line 2 for sequentially induction-hardening the cup portion Wc and the stem shaft portion Ws is disposed on the base portion 4 of the frame 3. Various driving units, wiring, piping, and the like necessary for operating the heat treatment line 2 are disposed inside the base unit 4. The entire front side of the frame 3 including the upper portion of the base portion 4 is covered with the front cover 100.

  In the heat treatment line 2, as shown in FIGS. 1 and 2, a temporary phasing unit 30 is provided between a carry-in position provided on one end side in the width direction of the heat treatment apparatus 1 and a carry-out position provided on the other end side. And a phase determination processing unit comprising the phase determination unit 40, a workpiece lower heat treatment unit 50, a workpiece upper heat treatment unit 60, and an aftercool processing unit 70 are provided in order, and a transport mechanism for transporting the workpiece W between the processing units. 80 is provided.

[Transport mechanism]
The transport mechanism 80 has a work stop position from the first station A to the sixth station F between the carry-in position and the carry-out position, and is located at the front side end of the middle plate 5 provided in the base portion 4 throughout. A conveyance axis L is set linearly along the workpiece, and the workpiece W can be intermittently conveyed to the stations A to F along the conveyance axis L. Here, the transport axis L is a movement locus of the central axis of the work W to be transported.

  The transport mechanism 80 includes a table-type transport mechanism 10 that transports the workpiece W from the first station A that is the carry-in position to the fourth station D that is the intermediate transfer position, and a sixth station F that is the unload position from the fourth station D. And a gantry-type transport mechanism 20 that transports the workpiece W to the top.

[Phase determination processing section]
In the phase determination processing unit, the temporary phase determination unit 30 is provided in the first station A, and the workpiece W is placed on the temporary phase determination table 11 with the stem shaft portion Ws facing upward to determine the temporary phase in the circumferential direction. .
The phasing unit 40 is provided at the second station B, and the workpiece W placed on the temporary phasing table 11 is transferred to the phasing table 12 by the lifting chuck mechanism 44 to accurately move the workpiece W in the circumferential direction. Determine the phase.

[Work heat treatment part under the workpiece]
The workpiece lower heat treatment section 50 is intermittently half-rotatable and raised and lowered at a 180 ° symmetrical position around the workpiece lower rotating shaft 53a and the workpiece lower rotating shaft 53a which are erected on the middle plate 5 of the base portion 4. Two rotating chuck mechanisms 52 that are detachably mounted, and a workpiece lowering heat treatment head 56 that is provided on the middle plate 5 and that can heat-treat the cup portion Wc of the workpiece W held by the rotating chuck mechanism 52 are provided. The heat treatment head 56 for the lower part of the work is provided with a heating coil part, a coolant injection part, and the like.

  In the workpiece lower heat treatment section 50, the stem shaft portion Ws of the workpiece W transferred to the third station C by the phasing table 12 is held by the rotating chuck mechanism 52, and the workpiece W is lifted and rotated to rotate the workpiece lower heat treatment head. The cup portion Wc is heat-treated by rotating and lowering the workpiece W while rotating the workpiece W, and the rotary chuck mechanism 52 is rotated again to return to the third station C, and the transfer table 13 is transferred to the third station C. Perform the loading operation.

[Intermediate delivery position]
The fourth station D is at the intermediate delivery position, and the workpiece W is transferred to the fourth station D while being placed on the transfer table 13 at the third station C. In the fourth station D, the workpiece W is held and raised by the first gantry 21 that is slidably supported on the ceiling rail 24 and can move up and down, and is transferred to the fifth station E of the workpiece upper heat treatment section 60.

[Work heat treatment part]
The workpiece upper heat treatment section 60 includes a workpiece upper rotation shaft 61c protruding from the middle plate 5 of the base portion 4, an intermittent rotation table 61 supported by the workpiece upper rotation shaft 61c and capable of intermittent rotation every 1/3 rotation, The upper part receiving tool 61h is provided evenly at an equal distance from the center of the intermittent rotating table 61, and the upper part receiving tool 61h is provided so as to be able to spray coolant around the work W. And an annular cooling jacket 62.

  In the workpiece upper heat treatment section 60, when the workpiece W is transferred to the fifth station E by the first gantry 21, the workpiece W is received by the workpiece gantry 21 by the lowering of the first gantry 21 and the vertical movement of the workpiece upper lifter 63. 61h. The workpiece is transferred to the workpiece upper heating position H by the intermittent rotation table 61, and the workpiece W is raised to the heating coil portion corresponding to the shape of the stem axis Ws by the workpiece upper lifter 64, and the stem axis Ws is heated. When the workpiece is lowered at the workpiece upper heating position H and placed on the workpiece upper receiving tool 61h, the cooling liquid is injected from the annular cooling jacket 62 to start cooling. While the cooling is continued, the workpiece is transferred to the workpiece upper cooling position I by the intermittent rotation table 61, and the cooling is continued for a predetermined time at this position to finish the cooling. Thereafter, the workpiece W is returned to the fifth station E again by the intermittent rotation table 61.

[Aftercool processing section]
The aftercool processing unit 70 includes a reversing table 71 that is intermittently driven by half rotation, and the positions at which the rotation of the reversing table 71 stops are the sixth station F and the aftercooling position J. The workpiece W transferred from the fifth station E by the second gantry 22 is placed on the reversing table 71 at the sixth station, transferred to the aftercooling position J by the reversing table 71, and cooled to the workpiece W at the aftercooling position J. By spraying or gas, the heat remaining on the workpiece W is released and returned to the sixth station F again.
Then, the workpiece W that has been heat-treated can be taken out from the sixth station F.

[Cover structure]
In the heat treatment apparatus 1 of the present embodiment, the entire front side is covered with a front cover 100 as shown in FIGS. 3 to 6. The front cover 100 has an upper cover 111 that covers the upper part from the front side from the base part 4.
The upper cover 111 includes a plurality of upper opening / closing doors 112a and 112b covering the front side of the entire length of the heat treatment line 2. Each of the upper doors 112a and 112b is formed of a sliding door that is slidably supported by an upper and lower door rail 115 and a lower door door rail 116 that are linearly disposed on the frame 3 along the conveyance axis L.

  In this embodiment, two upper and lower door rails 115 and 116 are provided in parallel, and the upper door 112a as the first door disposed on the outside, The upper opening / closing door 112b as the second opening / closing door disposed is supported by the different upper / lower door rails 115 and 116, respectively. When the upper door 112a and the upper door 112b are closed, an overlapping portion 127 is formed that overlaps the front and rear from the front side, and the lock structure 150 is formed in the overlapping portion 127 and its vicinity.

  As shown in FIGS. 5 and 6, the upper / lower door rail 115 has a mountain shape protruding upward, and is mounted parallel to the upper frame 3 a disposed on the front side of the top of the frame 3. In this embodiment, an upper auxiliary rail 119 made of a flat plate member is fixedly provided obliquely below each upper / lower door rail 115, and the top of the convex portion 115a of the upper / lower door rail 115 and the upper auxiliary rail 119 are provided. The relative position with respect to the lower surface is substantially constant over the entire length.

  The door-to-door lower rail 116 is formed in a flat plate shape, and is erected on both side surfaces of the door-to-door lower rail base 121 fixed in the vicinity of the front side end portion of the base portion 4 with the side edges facing upward. It is fixed in a state. The two door door lower rails 116 are arranged in parallel to each other at the same height. Further, a lower auxiliary plate 123 is provided at an intermediate position between the two lower door door rails 116 and is fixed in parallel with the lower door door rails 116. An outer frame plate 124 is disposed on the part so as to protrude upward from the lower rail 116 for the door.

  Each upper opening / closing door 112a, 112b is formed to have substantially the same width, and the outer shape of the longitudinal section is substantially constant over the entire width, and the lower edge of the upper opening / closing door disposed near the front side end of the base portion 4 125 and an overhanging portion 126 bulging outward from the front side end portion of the base portion 4 above the lower edge portion 125 of the upper opening / closing door.

  Each of the upper doors 112a and 112b includes an overhang portion 126 and an upper door lower edge 125 that have substantially the same vertical cross-sectional shape, so that the upper door 112a is disposed inside the upper door 112a when opened. The upper opening / closing door 112b can be placed one behind the other, and in the closed state, the adjacent upper opening / closing doors 112a and 112b are close to each other in the overlapping portion 127.

On the upper end side of each of the upper doors 112a and 112b, upper slide support portions 131 that support the upper doors 112a and 112b to be slidable on the upper door 115 for the doors are provided at two locations in the width direction.
The upper slide support 131 is mounted on an upper door 132 that can roll on the upper rail 115 for the door, and an upper adjustment bracket 133 that rolls in contact with the lower surface of the upper auxiliary rail 119 from below. A cam follower 134 is provided. The upper doors 112a and 112b are mounted so that the upper door 115 and the upper auxiliary rail 119 are sandwiched from above and below by the upper door 132 and the upper cam follower 134. The upper rail 115 is prevented from coming off.

On the lower end side of each of the upper doors 112a and 112b, lower slide support portions 136 are provided at two locations in the width direction for supporting the doors slidably on the lower rail 116 for the doors.
The lower slide support part 136 includes a lower bracket 135 attached via a height adjustment part 137, a lower door wheel 138 attached to the lower bracket 135 so as to roll on the lower rail 116 for the door, and a door A lower cam follower 139 that rolls in contact with the side surface of the lower rail 116 from the side is provided. Here, the lower cam follower 139 abuts on the side surface of the lower door door rail 116 and rotates, thereby preventing the upper door doors 112a and 112b from sliding off the lower door door rail 116 while sliding. ing. In addition, the side surface of the lower end side of each upper opening-and-closing door 112a, 112b may be in contact with the lower auxiliary plate 123 so that sliding is possible.

  On the upper doors 112a and 112b, a handle 141 for opening and closing the upper doors 112a and 112b is further provided on the inclined surface below the overhang portion 126 for each of the upper doors 112a and 112b. The handle 141 is formed in a substantially L shape from a pipe-like material, and is arranged so as not to protrude outward from the outer shape of the overhang portion 126 in plan view. Specifically, the distance from the outer surface of the upper door lower edge 125 to the tip of the handle 141 is the distance between the outer surface of the upper door lower edge 125 and the outermost surface of the overhang 126. It is below the horizontal distance between.

  In such an upper cover 111, as shown in FIGS. 2 and 3, the entire front side of the heat treatment line 2 is covered by four upper opening / closing doors 112a and 112b, and from the left end to the right end in a front view. By the upper doors 112a and 112b, the first and second sections A and B, the third section and the workpiece lower heating position G, the fourth section D and the workpiece upper heating position H, the workpiece upper cooling position I and the first 6 sections F are covered by separate upper doors 112a and 112b.

[Lock structure]
As shown in FIGS. 7A to 7E, the lock structure 150 provided in the upper doors 112a and 112b is provided in the overlapping portion 127 and in the vicinity thereof, and the upper door 112a and the upper door 112b are relative to each other. The lock unit 151 that can be connected and fixed in a non-movable manner, and a signal that can detect whether the lock unit 151 is locked or unlocked, and that the lock unit 151 is in the unlocked state can be transmitted to, for example, the control unit 185 shown in FIG. And a detection unit 152 for transmission.

  The lock portion 151 includes a lock support portion 154 fixed to the outer surface of the outer upper opening / closing door 112a, a rod-shaped lock operation portion 153 supported by the lock support portion 154 so as to be able to advance and retreat, and an outer upper opening / closing door 112a. A support hole 155 provided in the overlapping portion 127 and capable of advancing and retracting the tip of the lock operating portion 153, and an overlapping portion 127 of the inner upper opening / closing door 112b are provided so as to correspond to the support hole 155, and the lock operating portion 153 A lock hole 156 whose front end can be fitted and removed and the upper opening / closing door 112a, 112b are closed, and is provided in the lower auxiliary plate 123 so as to correspond to the support hole 155 and the lock hole 156, and And a concave lock receiving portion 157 whose tip can be fitted and detached.

  The rod-shaped lock actuating portion 153 is provided at a constant small diameter portion 153a provided at the distal end side, a constant medium diameter portion 153b thicker than the thin diameter portion 153a provided at the intermediate portion, and an outer end portion. A grip 158 and a guide block 159 that is fixed to the medium diameter portion 153b and protrudes substantially orthogonally are provided. A substantially L-shaped detection object 160 that can be detected by the detection unit 152 is fixed to the guide block 159.

  The lock support portion 154 is provided between a pair of leg portions 161 that support the lock operation portion 153 so as to be slidable in a horizontal direction substantially perpendicular to the lower door 116 for the door, and a guide block 159 is provided between the pair of leg portions 161. A guide rail 162 that is slidably fitted, and a stopper 163 with which the guide block 159 can come into contact with the advancement / retraction of the lock operating portion 153 are provided.

  In the lock support portion 154, as shown in FIG. 7E, the lock operation portion 153 is slid in the forward direction from the outside to the inside of the front surface of the heat treatment apparatus 1, and the guide block 159 is brought into contact with the stopper 163. Then, the small diameter portion 153a of the lock operating portion 153 is inserted into the lock receiving portion 157 and the lock hole 156 of the upper door 112b, and the pair of upper doors 112a and 112b are connected in a closed state and locked at a predetermined position. It becomes. At this time, since the guide block 159 is guided by the guide rail 162, the lock actuating portion 153 can move forward without rotating, and the detected object 160 is disposed at a predetermined advance position.

  When the lock actuating part 153 is retracted, the narrow diameter part 153a of the lock actuating part 153 is detached from the lock hole 156 and the lock receiving part 157 of the upper door 112b, and the connection with the lock hole 156 of the upper door 112b is released. The lock is released. Further, at the position where the guide block 159 contacts the stopper 163, the lock operating portion 153 is supported by the upper door 112a.

On the other hand, the detection unit 152 of the lock structure 150 is disposed in front of the second or third station B, C and the fifth station E, and is near a position corresponding to the detected object 160 in the base unit 4 of the frame 3. Is provided with a detector 165 fixed thereto. The detector 165 has a detection hole 166 into which the detected object 160 can be inserted and removed, and can detect the presence of the detected object 160 in the detection hole 166 and transmit it to the control unit 185. Yes.
Note that the detector 165 of the present embodiment is configured to be able to hold the detection target 160 inserted into the detection hole 166 in a non-detachable manner based on a signal from the control unit 185 or the like, and to perform a lock operation. It is possible to hold the state where the portion 153 is inserted into the lock receiving portion 157 and the lock hole 156.

The lock operation unit 153 and the detection unit 152 of the lock structure 150 are provided so as to protrude outside the upper opening / closing doors 112a and 112b, and compared with the case where they are provided inside the upper opening / closing doors 112a and 112b. The amount of the front end edge of the portion 4 protruding to the near side is suppressed to be small, and the depth of the base portion 4 is easily reduced.
In addition, the outer protruding portions of the lock portion 151 and the detection portion 152 are provided within the bulging range of the overhang portion 126, and the lock portion 151 and the detection portion are formed from the outer surfaces of the lower edges of the upper doors 112a and 112b. The distance to the portion arranged on the outermost side of 152 is within the range of the horizontal distance between the outer surface on the upper doors 112 a and 112 b and the outer surface of the overhang portion 126.

[Piping structure]
In the heat treatment apparatus 1 in this embodiment, a large number of wires and pipes are provided in the base portion 4, and as shown in FIG. 8, a coolant is supplied to the workpiece lower heat treatment portion 50, the workpiece upper heat treatment portion 60, etc. A liquid supply path 200 for recovering the flowing coolant is disposed at a predetermined position by a hard piping member.

As shown in FIGS. 8 and 9, the liquid supply path 200 includes a primary side introduction unit 201 in which a coolant from a coolant source is supplied to a lower part on the back side of the frame 3, and a work lower part from the primary side introduction unit 201. The coolant is appropriately branched so as to divide the coolant into the heat treatment section 50, the workpiece upper heat treatment section 60, the aftercool treatment section 70, and the like, and is arranged along the bottom of the base section 4 up to the vicinity of the front side end of the base section 4. A plurality of bottom liquid supply paths 202, a plurality of rising pipes 203 provided so as to continuously rise from the bottom liquid supply path 202 on the front side of the base part 4, and a rising pipe 203 continuous on the front side of the base part 4. And a plurality of top liquid supply passages 204 disposed along the top back side of the base portion 4 to positions near the processing units 50, 60, 70, and the like.
The base portion 4 has a structure in which a middle plate 5 is disposed on a base frame 4a made of a shape steel such as a C shape, an L shape, or an H shape. Therefore, the arrangement height of the bottom liquid supply path 202 and the top liquid supply path 204 is set within the range of the arrangement height of the shape steel of the base frame 4a arranged in the substantially horizontal direction, and the shape steel of the base frame 4a is appropriately set. It is good to arrange through.

Each of the plurality of rising pipes 203 is provided with a flow adjusting unit 205 such as a valve for adjusting the flow state of the coolant at the same height. Here, the flow state is, for example, the flow rate or the fluid pressure of the coolant, and the flow adjustment unit 205 is a lever or a handle for manually adjusting them, and a flow meter is provided in the vicinity of the flow adjustment unit 205. It may be.
In this embodiment, a plurality of flow control units 205 are arranged near the front positions of the processing units 50, 60, 70, etc., to which the cooling liquid is supplied by the liquid supply path 200 provided with the flow control units 205. .

[Operation and effect]
In the heat treatment apparatus 1 having such a lock structure 150, in order to perform heat treatment of the workpiece W, the upper doors 112a and 112b are usually closed and the lock portions 151 are locked. And if the operation panel 190 is operated, each part of the heat processing line 2 will operate | move. In this state, the work W is carried into the temporary phasing table 11 of the first station A and the heat treatment line 2 is automatically operated, so that the work W after the heat treatment can be carried out from the reversing table 71 of the sixth station F.

In order to perform the maintenance work, one or both of the upper door 112a and the upper door 112b on the front side of each maintenance part are opened.
In order to open, first, the lock state of the upper doors 112a and 112b by the lock part 151 is released. To release the locked state, the lock actuating portion 153 of the lock portion 151 is pulled out to the near side. Then, the lock operating portion 153 is detached from the lock hole 156 provided in the upper opening / closing door 112b and the lock receiving portion 157 of the lower auxiliary plate 123, and the connection between the upper opening / closing door 112a and the upper opening / closing door 112b is released, The connection between the lock operating portion 153 and the lower auxiliary plate 123 is also released. Accordingly, the upper doors 112a and 112b can be freely opened and closed along the upper door 115 for the door and the lower rail 116 for the door.

At that time, the detection target 160 provided in the lock operating unit 153 is also detached from the detection hole 166 of the detection unit 152. Then, the unlocking state of the lock unit 151 is detected by the detection unit 152, and the signal is transmitted to the control unit 185. In the control unit 185, the automatic operation of each processing unit of the heat treatment line 2 is blocked based on a preset program, and for example, power supply to each driving unit is shut off. In this state, each part of the heat treatment line 2 does not operate even if the operation panel 190 is operated.
And various maintenance is performed in the state which opened the upper opening-and-closing doors 112a and 112b.

  Next, in order to operate the heat treatment line 2 after opening the upper doors 112a and 112b, all the upper doors 112a and 112b are closed, and the lock operating portion 153 of the lock portion 151 is connected to the lock hole 156 and the lock receiving portion. The lock unit 151 is locked by inserting the detection target 160 into the detection hole 166 of the detection unit 152. As a result, a signal indicating the locked state is not transmitted from the detection unit 152 to the control unit 185, or a detection signal indicating the unlocked state is not transmitted to the control unit 185. Therefore, by operating the operation panel 190, each processing unit of the heat treatment line 2 can be automatically operated again.

  In order to open any one of the upper doors 112a and 112b during the automatic operation of the heat treatment line 2, the lock unit 151 must be unlocked. Therefore, when the upper doors 112a and 112b are released, the detection unit 152 detects the operation and the control unit 185 prevents the operation of each processing unit in the heat treatment line 2 and stops the apparatus.

  According to the lock structure 150 of the present embodiment and the heat treatment apparatus provided with the lock structure 150 as described above, the lock part 151 that fixes the upper doors 112a and 112b so as not to move relative to each other, and the lock part 151 is unlocked. And a detection unit 152 capable of detecting the state. Therefore, when the upper doors 112a and 112b are in the unlocked state, the automatic operation of each part of the heat treatment line 2 can be prevented based on the signal of the detection unit 152, and the heat treatment is performed with the upper doors 112a and 112b open. It is possible to prevent each part of the line 2 from being driven. Moreover, since the lock portion 151 is provided in the overlapping portion 127 that overlaps each other when the upper doors 112a and 112b are closed and the detection portion 152 is provided, the number of the lock portions 151 and the detection portions 152 can be reduced. The configuration of the lock structure 150 and the heat treatment apparatus 1 can be simplified.

  In the lock structure 150 or the heat treatment apparatus 1, since the lock receiving portion 157 is provided at a predetermined position with respect to the lower door door rail 116, the upper opening / closing doors 112 a and 112 b are connected by the lock operating portion 153. If the upper and lower doors 112a and 112b are slidably supported by the upper and lower door rails 115 and 116, the upper and lower doors 112a and 112b can be arranged at predetermined positions. Therefore, each part of the heat treatment line 2 can be easily and reliably covered with the upper doors 112a and 112b.

  Moreover, in the lock structure 150 or the heat treatment apparatus 1, the upper opening / closing doors 112 a and 112 b have an overhang portion 126 bulging outward from the lower edge portion at a position above the lower edge portion, and the lock portion 151 and the detection portion 152. The outer projecting portion is provided within the bulging range of the overhang portion 126. Therefore, it is difficult to generate a portion where the lock portion 151 and the detection portion 152 are arranged to protrude outward in the horizontal direction from the upper opening / closing doors 112a and 112b, and the lock portion 151 and the protrusion portion are not easily obstructed.

  In the heat treatment apparatus 1 of this embodiment, a plurality of liquid supply paths 200 for supplying a cooling liquid to a plurality of locations of the heat treatment line 2 are provided inside the base portion 4, and each of the plurality of liquid supply paths 200 includes a predetermined liquid. Since the flow adjusting unit 205 for adjusting the flow state is arranged near the front side end portion inside the base part 4 where the heat treatment line 2 is arranged, each flow adjusting unit 205 is arranged from the front side. The flow state of the plurality of liquid supply paths 200 can be easily adjusted, and the maintainability is good.

  In this heat treatment apparatus 1, each flow adjusting unit 205 is located near the front position of each part such as the workpiece lower heat treatment unit 50, the workpiece upper heat treatment unit 60, and the aftercool treatment unit 70 to which a predetermined liquid is supplied through each liquid supply path 200. Since they are arranged, the operator can easily recognize the portion adjusted by each flow adjusting unit 205, and the adjustment work of the coolant supplied to each unit can be easily performed.

  The above-described embodiment can be appropriately changed within the scope of the present invention. For example, in the above description, the upper opening / closing doors 112a and 112b have been described as examples of sliding doors. However, the present invention can also be applied to an opening / closing door that is supported by a hinge portion and is rotatable.

DESCRIPTION OF SYMBOLS 1 Heat processing apparatus 2 Heat processing line 3 Frame 3a Upper frame 4 Base part 5 Middle plate 10 Table type conveyance mechanism 11 Temporary phase determination table 12 This phase determination table 13 Transfer table 20 Gantry type conveyance mechanism 21,22 The 1st and 2nd gantry 24 Ceiling rails 25, 26 Third and fourth air cylinders 30 Temporary phasing unit 40 Main phasing unit 44 Lifting chuck mechanism 50 Workpiece lower heat treatment unit 52 Rotating chuck mechanism 53 Reciprocating rotation means 53a Rotating shaft for workpiece lower part 56 Workpiece lower part Heat treatment head 60 Work heat treatment part 61 Intermittent rotary table 61c Work upper part rotation shaft 61h Work upper support 62 Annular cooling jacket 63, 64 Work upper lifter 65 Work upper heating unit 70 After cool treatment part 71 Reversing table 80 Transport mechanism 100 Surface cover 111 Upper cover 112a, 112b Upper door 115 Upper rail 115a for opening / closing door Convex 116 Lower rail for opening / closing door 118 Upper frame portion 119 Upper auxiliary rail 121 Lower rail base portion for opening / closing door 123 Lower auxiliary plate 124 Outer frame plate 125 Upper opening / closing door lower edge portion 126 Overhang portion 127 Overlap portion 131 Upper slide support portion 132 Upper door wheel 133 Upper adjustment bracket 134 Upper cam follower 136 Lower slide support portion 137 Height adjustment portion 138 Lower door wheel 139 Lower cam follower 141 Handle 150 Lock structure 151 Lock portion 152 Detection portion 153 Lock operation portion 154 Lock support portion 155 Support hole 156 Lock hole 157 Lock receiving portion 158 Grip 159 Guide block 160 Object to be detected 161 Leg portion 162 Guide rail 163 Stopper 165 Detector 66 Detection hole 170 Power supply unit 180 Power distribution unit 185 Control unit 190 Operation panel 200 Liquid supply channel 201 Primary side introduction unit 202 Bottom liquid supply channel 203 Rising pipe 204 Top liquid supply channel 205 Flow adjustment unit 210 Coolant supply recovery unit 211 Return water collection Liquid part A 1st station B 2nd station C 3rd station D 4th station E 5th station F 6th station G Workpiece lower heating position H Workpiece upper heating position I Workpiece upper cooling position L Conveyance axis W Work Wc Cup part Ws Stem shaft

Claims (4)

It is a lock structure of the door for the heat treatment device that covers the outside of the heat treatment line,
The first and second doors, which are formed of sliding doors slidably supported on the rails and can be opened and closed at positions corresponding to the heat treatment line, and the first and second doors are closed. A locking portion that is provided in an overlapping portion that overlaps each other in a state and that connects the first and second doors to each other so as to be relatively unmovable, and a detection portion that can detect the unlocked state of the locking portion. ,
A lock structure for an opening / closing door for a heat treatment apparatus, configured to prevent driving of the heat treatment line when the unlocking state of the lock portion is detected by the detection unit. The locking portion, the first and second and is supported on one and the other possible coupling lock operating portion of the opening and closing door, said fixed to a predetermined position of the rail which corresponds to the overlapping portion the lock operation portion The lock structure of the door for heat processing apparatus of Claim 1 provided with the lock | rock receiving part which can connect.   The first or second opening / closing door has a lower edge portion and an overhang portion provided at a position above the lower edge portion and bulging outward from the lower edge portion. The part is provided within the bulging range of the overhang part, and the lock structure of the door for a heat treatment apparatus according to claim 1 or 2. In a heat treatment apparatus having a heat treatment line controlled automatically by a control unit and a first and second opening / closing doors which are formed of sliding doors slidably supported on rails and cover the outside of the heat treatment line,
A lock portion that is provided in an overlapping portion that overlaps with each other when the first and second doors are closed, and that locks the first and second doors so as not to move relative to each other; and the lock portion A detection unit capable of detecting the unlocked state of
A heat treatment apparatus having an open / close door, wherein when the unlocking state of the lock part is detected by the detection part, automatic operation of the heat treatment line is blocked by the control part.

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